IE6.0 Problem and Linksys Wirless-G

Fresh reformat and reinstall of WindowsXP SP1 with all Updates. Linksys
Wireless-G Access Point [WAP54G] with Linksys Wireless-G PCI Card [WMP54G]
installed and also with an SMC ethernet PCI 10 card installed but not
normally connected.
Wireless Network Connections is showing Speed: 54.0 Mbs and Strength Signal:
Excellant.
Cannot get IE 6.0 to function with wirless connection.
When I connect with a patch cable from the WAP54G to the SMC ethernet card
and reboot, IE6.0 connects to the internet as you would expect and works
well. If I disconnect the patch cable and reboot, IE6.0 will not connect to
the internet even though the Wireless Network Connection is showing as
decsribed above.
All Drivers seem to be as they should be when checking the Hardware device
manager.
What am I forgetting here?